From owner-freebsd-fs@FreeBSD.ORG Mon May 17 14:28:01 2010 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 410061065673 for ; Mon, 17 May 2010 14:28:01 +0000 (UTC) (envelope-from gljennjohn@googlemail.com) Received: from mail-fx0-f54.google.com (mail-fx0-f54.google.com [209.85.161.54]) by mx1.freebsd.org (Postfix) with ESMTP id B9A288FC2B for ; Mon, 17 May 2010 14:27:57 +0000 (UTC) Received: by fxm19 with SMTP id 19so1005356fxm.13 for ; Mon, 17 May 2010 07:27:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:received:received:date:from:to:cc:subject :message-id:in-reply-to:references:reply-to:x-mailer:mime-version :content-type:content-transfer-encoding; bh=rEMdfBFI8zWtV9ay6ZAaNfV9nmyphBH3KoY7Ugc2SDc=; b=o7+WyE5hY6qVh3H8x2rRKVIc3xJGVIc0Mr14sq0jobxyWMXOGAlFReexsu3Yrq1Ezq Rr+F8ZA9UjrDgmcVOsiRmUxvNdDj4cQqJ9RzmSzjr4jj4gQ1TSqLrNb9UviaQSa4+kw8 tAtcEQx97TZdfBGuRcjEC9q9/AmzvHdttQaRA= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=date:from:to:cc:subject:message-id:in-reply-to:references:reply-to :x-mailer:mime-version:content-type:content-transfer-encoding; b=RrYrgx1GsHNwPxlwmbFKVLSA6et+dvKaVNTbVAVfD8AuvAsI9zxzPItasOtz432rmS 2FRBsD/wYWR5+3unfadX0nelDPpQhThdoGnM1GFMSWNn8jLhd83F6g1B0/WkkhbNY3C8 KrOIBMKI8yJIVNWIRa2xcNNBNgBERSm4hV+cg= Received: by 10.223.32.85 with SMTP id b21mr6353196fad.95.1274105068925; Mon, 17 May 2010 07:04:28 -0700 (PDT) Received: from ernst.jennejohn.org (p57AE50EE.dip.t-dialin.net [87.174.80.238]) by mx.google.com with ESMTPS id g10sm25987344fai.0.2010.05.17.07.04.27 (version=TLSv1/SSLv3 cipher=RC4-MD5); Mon, 17 May 2010 07:04:28 -0700 (PDT) Date: Mon, 17 May 2010 16:04:26 +0200 From: Gary Jennejohn To: Jeremy Chadwick Message-ID: <20100517160426.3c54e07e@ernst.jennejohn.org> In-Reply-To: <20100516210151.GA82487@icarus.home.lan> References: <4BEF2F9C.7080409@netscape.net> <4BEF3137.4080203@netscape.net> <20100516001351.GA50879@icarus.home.lan> <4BEF4A73.8060905@netscape.net> <20100516015850.GA55302@icarus.home.lan> <657328.88413.qm@web112409.mail.gq1.yahoo.com> <20100516210151.GA82487@icarus.home.lan> X-Mailer: Claws Mail 3.7.5 (GTK+ 2.18.7; amd64-portbld-freebsd9.0) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: freebsd-fs@freebsd.org Subject: Re: Quick ZFS mirroring question for non-mirrored pool X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: gljennjohn@googlemail.com List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 May 2010 14:28:01 -0000 On Sun, 16 May 2010 14:01:51 -0700 Jeremy Chadwick wrote: > * As has been proven time and time again, MTBF means jack squat since > it's all hypothetical (mathematically calculated based on fab tests). > Drives will fail no matter what; that's the entire reason people are > using ZFS to begin with. ;-) > Hear, hear! I bought a supposedly server-grade SATA drive from Samsung a few years ago. Within a few weeks the spindle broke. I'd never seen that before and was totally flabbergasted. Who'd expect the spindle to break? -- Gary Jennejohn